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Corticoseptal projections in the snakes Natrix sipedon and Thamnophis sirtalis
Author(s) -
Ulinski Philip S.
Publication year - 1975
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.901640308
Subject(s) - biology , commissure , anatomy , thamnophis sirtalis , dorsum , natrix , anterior commissure , cortex (anatomy) , neuroscience , zoology
The projections of the cerebral cortex upon the septum in water snakes ( Natrix sipedon ) and garter snakes ( Thamnophis sirtalis ) were studied with the Fink‐Heimer degeneration techniques. Two cortical areas send major projections to the septum. Medial cortex projects bilaterally to the dorsal portion of the precommissural septum along its full rostrocaudal extent. The ipsilateral projection is more massive than the contralateral one. Dorsal cortex projects ipsilaterally to a column within the septum which is present dorsally, caudal to the level of the anterior commissure, but shifts ventrally as the septum is followed rostrally. Lateral cortex may send a sparse projection to the ipsilateral ventral septum.